AUTONOMY CORPORATION PLC ANNOUNCES AGREEMENT TO ACQUIRE MERIDIO HOLDINGS LIMITED

CAMBRIDGE, ENGLAND – 23 October 2007 - Autonomy Corporation plc (LSE: AU. or AU.L), a global leader in infrastructure software for the enterprise, today announced an agreement to acquire Meridio Holdings Limited, a leading provider of enterprise Records Management software.

The total value of consideration for the transaction is approximately £20 million, to be satisfied by the issuance of 1.33 million Autonomy ordinary shares with the balance of consideration payable in cash. Depending on the timing of completion, the acquisition is expected to have little to no impact on results in the fourth quarter of 2007.

About Autonomy Corporation plc
Autonomy Corporation plc (LSE: AU. or AU.L) is a global leader in infrastructure software for the enterprise and is spearheading the meaning-based computing movement. Autonomy's technology forms a conceptual and contextual understanding of any piece of electronic data including unstructured information, be it text, email, voice or video. Autonomy's software powers the full spectrum of mission-critical enterprise applications including information access technology, BI, CRM, KM, call center solutions, rich media management, information risk management solutions and security applications, and is recognized by industry analysts as the clear leader in enterprise search.

Autonomy's customer base comprises of more than 17,000 global companies and organizations including: 3, ABN AMRO, AOL, BAE Systems, BBC, Bloomberg, Boeing, Citigroup, Coca Cola, Daimler Chrysler, Deutsche Bank, Ericsson, Ford, GlaxoSmithKline, Kraft Foods, Lloyd TSB, NASA, Nestle, the New York Stock Exchange, Reuters, Shell, T-Mobile, the U.S. Department of Energy, the U.S. Department of Homeland Security and the U.S. Securities and Exchange Commission. Autonomy also has over 300 OEM partners and more than 400 VARs and Integrators, numbering among them leading companies such as BEA, Business Objects, Citrix, EDS, IBM Global Services, Novell, Satyam, Sybase, Symantec, TIBCO, Vignette and Wipro. The company has offices worldwide.

The Autonomy Group includes: ZANTAZ, the leader in the archiving, e-Discovery and Proactive Information Risk Management (IRM) markets; Cardiff, a leading provider of Intelligent Document solutions; etalk, award-winning provider of enterprise-class contact center products and Virage, a visionary in rich media management and security and surveillance technology.

Further Information for Meridio Customers

• Letter to customers
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